If you've been searching for a foam wall hot tub, you already know the appeal: insulated rigid foam walls that hold heat far better than a standard inflatable, a sturdy structure that doesn't wobble, and a spa experience that feels genuinely premium without a permanent shell installation price tag.
Wave Spas was the first brand to bring this technology to UK consumers, and our three foam models (Como, Garda, and Tahoe) remain the most searched foam spas on the market.
The question we get asked most is simple: which one should I buy? The answer depends on how many people will use it, the shape of your garden or patio, your budget, and how seriously you take the hot tub lifestyle. This guide walks through everything so you don't have to guess.
What is a Foam Wall Hot Tub - and Why Does it Matter?
A foam wall hot tub (sometimes called a rigid foam spa or foam-walled spa) uses multiple layers of high-density foam to construct its walls, rather than the single or double-layer PVC bladder used in a traditional inflatable hot tub. This makes a significant practical difference:
- Heat retention: Foam is an excellent insulator. Foam wall hot tubs lose heat far more slowly than inflatables, meaning your heater runs less often and your energy bills stay lower.
- Structural rigidity: The walls don't flex or wobble. You can sit on the edge, lean against the wall, and the spa holds its shape.
- Durability: Foam construction is significantly more puncture-resistant than standard inflatable PVC. No more worrying about a rogue garden fork.
- Setup stability: Once installed and filled, a foam wall hot tub stays in shape season after season without constant topping up of air pressure.
The trade-off compared to a hard-shell acrylic spa? Price and portability. Foam wall hot tubs cost a fraction of a permanent installation, can be broken down and stored away if needed, and require no groundworks or specialist fitting. They're the sweet spot for the vast majority of UK garden owners.
Wave Spas Foam Models at a Glance
The Como
Social Luxury. All-Season Performance. Effortless Control.
Transform your outdoor space into a year-round oasis. The Wave Como is a spacious six-person octagonal spa featuring the Gold Award-Winning Wave Flow™ Dual Circulation System and integrated SmartSpa™ Wi-Fi control. Engineered with advanced Eco Foam insulation that is 60% more efficient than standard models, the Como locks in a blissful 40°C for just £2 a day, delivering a premium, low-energy portable hot tub solution regardless of the season.
Specifications
| Shape / Capacity |
Octagonal / 6-Person |
| Dimensions (Ext/Int) |
195cm / 171cm |
| Depth / Wall Width |
70cm / 12cm |
| Water Capacity |
985L (260GAL) |
| Massage System |
90 Bubble Jets |
| Material |
UV-protected PVC with PU foam core |
| Heater |
1800W Eco (Max 40°C) |
| Flow Rate |
1,325L / hour |
| Warranty |
2-Year Hot Tub
1-Year Heater
|
The Garda
Smart Engineering. Silent Luxury. The Future of Relaxation.
The Wave Garda is a sophisticated square-silhouette spa featuring the Gold Award-Winning Wave Flow™ Dual Circulation System and premium foam insulation that is 60% more efficient than inflatable models. With integrated Wi-Fi control and a Whisper-Quiet Eco-Heater, the Garda delivers a tailored 40°C oasis for as little as £2 a day, offering peak performance in total silence.
Specifications
| Shape / Capacity |
Square / 4 or 6-Person |
| Dimensions (Ext) |
160cm (4p) / 180cm (6p) |
| Dimensions (Int) |
130cm (4p) / 150cm (6p) |
| Depth / Wall Width |
70cm / 15cm |
| Water Capacity |
825L (4p) / 1100L (6p) |
| Massage System |
70/90 Bubble Jets |
| Material |
UV-protected PVC with PU foam core |
| Heater |
1800W Eco (Max 40°C) |
| Flow Rate |
1,325L / hour |
| Warranty |
2-Year Hot Tub
1-Year Heater
|
The Tahoe
Timeless Design. Everyday Escape. Effortless Control.
Bring effortless relaxation to any outdoor space with an oasis designed for year-round comfort. The Wave Tahoe is a classic round-silhouette spa featuring the Gold Award-Winning Wave Flow™ Dual Circulation System and integrated SmartSpa™ Wi-Fi control. Engineered with high-density foam insulation that is 60% more efficient than inflatable models, the Tahoe maintains a blissful 40°C for just £2 a day, delivering spa-grade luxury in a sleek, compact form.
Specifications
| Shape / Capacity |
Round / 4 or 6-Person |
| Dimensions (Ext) |
156cm (4p) / 184cm (6p) |
| Dimensions (Int) |
171cm (4p) / 160cm (6p) |
| Depth / Wall Width |
70cm / 12cm |
| Water Capacity |
650L (4p) / 985L (6p) |
| Massage System |
70/90 Bubble Jets |
| Material |
UV-protected PVC with PU foam core |
| Heater |
1800W Eco (Max 40°C) |
| Flow Rate |
1,325L / hour |
| Warranty |
2-Year Hot Tub
1-Year Heater
|
Foam Wall Hot Tub vs Inflatable: Is It Worth the Upgrade?
We get this question constantly. The short answer: yes, for almost every buyer. All three of the models above (Como, Garda, and Tahoe) are foam wall spas. Compared to a standard inflatable hot tub, you're getting:
- Significantly better heat retention (the foam acts as a thermal jacket)
- A more rigid structure that feels closer to a permanent spa
- Greater puncture resistance and seasonal durability
- Lower long-term running costs because you're fighting less heat loss
The only scenario where a standard inflatable makes more sense is if you need to deflate and move the spa extremely frequently - foam wall construction adds a little and setup time. For anyone with a fixed location in their garden, a foam wall hot tub is the right choice every time.
Frequently Asked Questions
What is the best foam wall hot tub for a small garden?
The Wave Spas Garda 4 person is the best foam wall hot tub for small gardens and compact patio spaces. Its square design maximises seating relative to footprint.
Is a foam hot tub better than an inflatable hot tub?
For most garden owners, yes. Foam wall hot tubs offer significantly better heat retention, a more rigid structure, and lower running costs than standard inflatable hot tubs. The Wave Spas Como, Garda, and Tahoe are all foam wall models.
How many people does the Wave Spas Garda hold?
The Wave Spas Garda is rated for 4–6 adults, making it the most versatile model in the foam range for families and small groups.
What is the difference between the Garda and the Tahoe?
The key differences are shape and capacity. The Garda is square and seats 4–6 people; the Tahoe is round and seats 4–6. The square design of the Garda suits rectangular patios and offers defined corner seating. Both use the same foam wall insulation technology.
Can foam wall hot tubs be used all year round in the UK?
Yes. The foam wall insulation on Wave Spas models makes them considerably more efficient in cold weather than standard inflatables, making year-round use practical and cost-effective in the UK climate.
Do foam wall hot tubs need a special power supply?
No, but it is recommended to utilise an external outdoor power plug. All Wave Spas foam models run from a standard 13-amp UK socket. no special wiring or electrical work required. The unit come with a 7m RCD safety 3-Prong plug (For external sockets).
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